Abstract: Pesticide runoff loads from grass surfaces were estimated through simulation experiments for 37 chemicals registered for use on U.S. lawns and golf courses. Simulation runs were made for each chemical and surface (lawns, ...

Abstract: A simple mathematical model is presented for estimating nitrate‐nitrogen concentrations in percolation from sludge land application sites. The model is based on annual mass balances of sludge and soil inorganic nitrogen ...

Abstract: A spreadsheet model MSWFLOW was developed as an accounting procedure for determining impacts of management decisions on the physical scale and productive outputs of a municipal solid-waste system. The model tracks the ...

Abstract: Pesticide runoff loads from grass surfaces were estimated for 29 chemicals commonly applied to U.S. lawns and golf courses. Data on pesticide properties and typical application rates and schedules were developed and ...

Abstract: Analytical procedures are proposed for estimating probability distributions of travel times for chemical waste loads to groundwater. Travel distance of the chemical is treated as a renewal process, and travel time is given ...

Abstract: The research described in this paper extended a deterministic screening model for ground‐water contamination to include specification of variability in water flux and soil and chemical properties. Uncertainty in these ...

Abstract: A Monte Carlo simulation approach is proposed for estimating the groundwater pollution risk from nitrate in percolation from sludge land application sites. The approach is used to estimate the probability that annual ...

Abstract: A Monte Carlo simulation experiment was conducted to explore the relationships between land use, climate, and water supply yields. A watershed streamflow and sediment yield model was coupled with a reservoir model and used ...

Abstract: Impacts of global warming on streamflows were estimated for four large watersheds in New York State using a daily streamflow model. Three different 100-yr daily weather sequences were input to the model. The first was ...